Doh, I meant 12 of course. You will need to build windmills and stock exchanges but they are decent buildings. The stock exchanges helps a fair bit with amassing gold. The timing is different with Freedom as you do not have to build parts which means that you can grow a bit more before you bulb to rocketry.
My singleplayer balance mod of BTS: https://dl.dropbox.com/s/3u6g4b2nfa74qhm...%20mod.odt?